Controls: volume, bass, middle, treble, gain, active/passive switch.Switchable impedance: 4 or 8ohmMetal case 1.5 mm Zintec chassis, steel vented topOutput: 500 watts RMSDimensions: (WxHxD) 12"W x 6-3/4"H x 5-1/2"DWeight: 11.02lb.